Telephone-repeater.



D. H. WILSON. TELEPHONE REPEATER. APPLICATION FILED JUN@ 13, 1911.

Patenten Apr. 22, 14913.

` to be used in connection with central energy system.

"ici izen of entren stains carenti onirica.

DAVID H. WILSON, 0E YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMEWS, im?DAVID H. WLSON AND RQBERT EINES, TRUSTEES, 0F NEW lil. Y.

Losanna.

To all'whom it 'may c iccrn:

Beit known that 1, DAVID H. l/VILSON, av the United lStates, residing atNew i origin the county of New York and State of New York, have inventeda certain new and useful Improvement in Telephone-Repeaters, of whichthe following is a specification.

'This invention' relates to telephone re-v peaters, and has for itsobjectto provide a new and improved device of this description.

The invention is'illustrated in the accom panying drawing, wherein thereis shown diagrammatically a repeater embodying the invention.

The present device is particularly adapted a charged line,

Referring now to the drawing, the repeater is providedwith a coreconsisting of the end sect-ions 1 and-2 connected by the connectingpiece .3, the parts forming a UF shaped end portion. There are twointermediate sections l and 5 and two end sections 6 and 7, 'the endsections connected toy gether by the connecting piece 8 so as to i'orina U-shaped endportion. The sections 1 and 6 are provided with coils 10and 11 which are connected in one branch 12 of the main line. Thesections 2 and 7 are provided with coils 13 and 1s' connected in theYother branch 15 of the main line. Connected with the coils 13 and 14 andin the main line 15 ,is a transmitter 16. This transmitter is providedwith two diaphragrns 17 and 18, said diaphragme being connected with theelec- 4trodes 19 and 20. Associated with the trans mittel' 16 are tworeceivers21 and 22 having diaphragme 9. The receiver 21 is provided withthe coils 23 which are connected in circuit with the coil 24 on theintermediate sec tion 41 of thecore'. The receiver 22 is provided withthe coils 2which are connected in circuit with the coil 26 on theintermediate section 5 of the core. A 'source of electric supply 27 isconnected Vin the 'main line circuit. 1

current in the coils 10, 11, 13 and 14 produces.

a talking current in the coils 24 and 26. The

talking currentsl in these coils then act Specication of Letters Patent.

In the operation of the device the talking TELEPHONE-REPEATER.

Patented Apr, 22, i913,

Application ld .Tune 13, 1911. Serial No. 632,951.

through the receivers 21 and 22 upon the transmitter diaphragme l? lsince the main line is a charged line, the talking current therein willThisvdevice, it will therefore be seen, bal ances the line andreinforces Athe current in the line by automatically producingaddimtional sound; waves therein.

On the connecting piece 3 there is provided a coil 28 to be used inconnect-ion with a listening key'.

I claim:

1. A repeater comprising a core divided into sections, some orf saidsections provided lwith coils connected in the :main line, a transmitterand a source of electric supply in cir.- cuit with said coils, separatedcoils on other ot' said sections, and receivers in circuit therewith,said receivers associated with said transmittter so as to actuate thesaine' when -a talking current is traversing the main line.

- 2. A repeater comprising a core' having two U-shaped end sections andtwointcn mediate sections,'a coil on each of the branches ottheil-shaped sections,said coils'l all connected in the main line circuit,a transmitter and a source of ,electr-ic supply in circuit with saidcoils, a coil on each of said intermedi-ate sections electricallydisconnected from the main line circuit, a rc'-V ceivcr connected incircuit with each of said and 18, and,

be reinforced;

latter coils, said receivers vassociated with said transmitter so as toactuate the Same.

f6, il repeater comprising two cores substantially parallel to eachother, each divided into three sections, the sections of the two coresat each end being magnetically connected, asingle coil upon each of theend sections, said coils connected in the' main circuit, a single coilupon each of the inter mediate sections, a receiver connected in cir--cuit with each of said latter coils, a transmitter in the main lineprovided with tvo diaphragme, said receivers opposed to the diapln-agniso .said transmitter. Y 4. A telephone repeater comprising a plurality ofcoils adapted to be connected inthe main line, a transmitter in circuitwith said coils, a receiver associated with said transmittcr so astoactuate the same, and a coil associated with said first `mentioned.coils and connected in circuit with said receiver.

` A telephone repeater comprising a pluralit-y of-coils adapted to beconnected inthe main line, a transmitter connected in circuit eef withsaid coils, two riiaphrztgnis connected Signed nt Chicago, Illinois,thistii day with said' transmitter, two, receivers, one 1 of May, A. D.1911.

associated with each of said diaphragms so A Y T that said diaphragmsare simultaneously ac- DAVID H'- WILSON tuated when the receivers. areactuated, and Witnesses: l, meansl associated with said main line coilsMINNIE M. LINDENAU,

f for actuating said receivers. 'EDNA K. REYNOLDS.

